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Finding the Fourth Proportional to 602.42, 831.08 and 425.64

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Solution

The fourth proportional to 602.42, 831.08 and 425.64 is: 587.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.42 : 831.08 = 425.64 : x
  2. Step 2: Convert to fraction form
    602.42/831.08 = 425.64/x
  3. Step 3: Cross multiply
    602.42x = 831.08 × 425.64
  4. Step 4: Simplify right side
    602.42x = 353,738.76
  5. Step 5: Solve for x
    x = 353,738.76/602.42
  6. Step 6: Final answer
    x = 587.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.